Sheet-glass-surfacing apparatus



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lllllllllllllll lllllllllllllllllllllllT Filed oct. 25. 192e E G STAH LE SHEET GLASS SURFACING APPARATUS Dec. 17, 1929.

7Patented Dec. 17, 1929 UNITED STATES man PATENT OFFICE ERIK G. STABLE, '01E' PITTSBURGH, PENNSYLVANIA., ASSIGNOR V'.lO I-IBBEY-OWENS' GLASS CDRW, 0F TOLEDO, OHIO, A CORPORATION 0F OHIO.

v l -l SHEET-GLASS-SURFACING APIPAARAT'S Application med-October 25, 1926. Serial No. 148,902.

This invention relates to sheet lass surfacing apparatus, and more partie arly to that form in which the glass is carried beneath a plurality of surfacing units.

The present invention is capable'of application in connection with surfacing machines of both the grinding and polishing types, and it is therefore to be understood that the invention is not restricted for use in connection with any one specific form of surfacing apparatus.

In polishing machines, after a certain period of use, the felts of the runners or polishing blocks become caked with rouge or other polishin material, and their eciency is re- A duced. f t, therefore, becomes necessary that these felts be either cleaned or renewed. Likewise, in grinding machines it becomes necessary to renew the grinder blocks, and in both types of machines it becomes necessary to clean the same, make repairs thereto,

.n quickly moved out of operative position into -V a position where it is readily accessible whereby to facilitate thereof.

Another object of the invention is to provide means for lowering and raising the surfacing machine in a vertical plane towards and away from the glass being surfaced.

Another object of the invention is the provision of means for preventing the lower end of the surfacing machine from swinging laterally with respect to the upper end thereof as the said machine is hemg raised and lowered. A

A further object of the invention is the pro-` vision of means for pivotally mounting the surfacing machine abovethe glass to he surfaced, together. with means for preventing said machine from swinging laterally on its pivot as the same is raised or lowered relative to the glass. k

A further object of the invention is to provide means for raising and lowering the surfacing machine relative to the glass being surfaced, together with means for the the cleaning or repairing Fig. 2 is a front view of a portion of the iml proved apparatus. v

Fig. 3 is a section taken on the line 3-3 of Fig; 1, and

Fig. 4 isa detail view of the polishing head of a polishing machine.

Referring now to the drawings, and particularly to Figs. 1, 2 and 3, there is disclosed a conventional t e of grinding machine designated in its ent1rety by the numeral 10 and including a casing 11 in which is journaled a runner spindle 12 driven from a motor/13 through the intermediary of suitable reducing gears located in the casing 14:. Secured 'to the lower end of the spindle 12 hy means of a universal joint 15, is the inder head or main runner casting 16 carrying a grinder hlock 1?. v

IThis machine is shown in connection with the process" wherein a series of sheets of glass 18 to be surfaced are supported upon a plurality of tables 19 mounted upon rails 20, said tables being adapted to carry the glass heneath a plurality of' surfacing units of the type hereinabove set forth.

For the purpose of supporting the surfacing unit 10 above the sheets 18, there is provided a carriage comprising'a hollow, substantially cone-shaped portion or housing 21 formed at its upper end with an annular shoulder 22. The surfacing unit 10 is received through the housing 21, and the casing 14: of said unit is provided with an annular ange 23 adaptedto rest upon the shoulder 22.

The upper end of the carriage is provided with a pair of oppositely disposed outwardly projecting 'trunnions 24,'and carried by the casing 11, adjacent the lower end thereof, are similar but somewhat smaller trunnions 25 disposed in vertical alignment with the trunnions 24. The trunnions 24 are adapted to be engaged by terminal hooks 26 formed on the levers 27. l

Positioned adjacent the surfacing unit 10 are the upwardly divergent bracket arms 28 and 29, the upper end of each arm being bifurcated to provide spaced legs 30 and 31 which rest upon and are secured to a horizontal supporting I-beam 31. Extending transversely between and secured to the spaced legs 30 and 31 of the bracket arms 28 and 29 are supporting pins 32. The levers 27 are received between the legs 30- and 31 of the arms 28 and 29, and are fulcrumed on the pins 32, as shown in Fig. 1, said levers 27 being provided in their lower` edges with notches or recesses 33 for receiving therein the pins 32.

The lower ends of the arms 28 and 29 are secured to a horizontal supporting I-beam 34, and are formed with the forwardly directed extensions 35 terminating in substantially U-shaped hooks or guide members 36 which receive therein the trunnions 25.v Shoes 37 and 38 are arranged wit-hin the U-shaped guide members 36, and the inner adjacent faces thereof are arcuately curved, as shown in Fig. 1, to permit the lower end of the machine to move laterally in an arc a distance equal to the arcuate movement of the pivot point 24 when the unit is raised or lowered. Theinner face of the shoe 37 is convex, while the inner adjacent face of the shoe 38 is concave, so that as the unit 10 is raised or lowered, the trunnions 24 and 25 will at all times be in vertical alignment with one another. The U-shaped guides 36 not only effectively prevent swinging movement of the lower end of the surfacing machine relative to the glass sheets 18, but further serve to retain the machine in a perpendicular position so that it will be movable in a plane always .at right angles to the surface of the glass. The shoes 37 and 38 are preferably removable so that when they become broken or worn they can be readily replaced by new ones.

In order to raise and lower the surfacing unit 10, the levers 27 are united and terminate in a single rearwardly and downwardly extending arm 39 pivotally connected as at 40 to a sleeve 41 movable on the rod 42 also secured to the I-beam 34. Also loosely received upon the rod 42 is a second sleeve 43, and positioned between the sleeves 41 and 43 is a cushion spring 45. An operating or hand wheel 44 is threaded upon the said rod outwardly of the sleeve 43, and when it is'desired to raise or lower the surfacing unit 10 relative to the glass 18, the hand wheel 44 is rotated in the desired direction, whereupon the levers 37 will be .rocked about the pins be equal to the arcuate movement of the pivot` point 24. The levers 27 and arm 39 form a bell crank which is forked at its upper end. By this arrangement the surfacing unit can be easily and quickly moved in a vertical plane out of engagementV with the glass being surfaced and into a position where the same will be readily accessible for the purpose of cleaning or repairing.

As brought out above, the present invention is capable of application in connection with surfacing machines of both thegrinding or the polishing type. The polishing machine would be of substantially the same construction as the grinding machine described hereinabove, with the exception that instead of providing the grinder head 16 and grinder block 17, there would be secured to the runner spindle 12 a runner frame 45 supporting a plurality of polishing blocks 46 as shown in Fig. 4.

It is to be understood that the form of the invention herewith shown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope ofthe subjoined claims.

Claims:

1. InA glass surfacing apparatus, a substantially vertically arranged surfacingunit, means associated with the' unit adjacent the upper end thereof for raising and loweringthe same vertically through an arc, and rigid means engaging the unit adjacent the lower end thereof for guiding the said lower end in order to retain said unit in a vertical position during -the raising and lowering operation by guiding the lower end of said unit in an arc equal to the are in which the upper end is raised.

2. In glass surfacinig apparatus, a substantially vertically arranged surfacing unit, means associated with the unit adjacent the upper end thereof for raising and lowering the same vertically through an arc, trunnions carried by said unit adjacent the lower end thereof, and-rigid guide members receiving said trunnions and adapted to retain said unit in a vertical position during the raising and lowering operation by guiding the lower end of said unit in an arc equal to the arc in which the upper end is raised.

3. In glass surfacing apparatus, a substantially vertically arranged surfacing unit, means pivotally associated with the unit adjacent the upper end thereof for raising and lowering the same vertically through an arc, substantially vertically arranged bracket members upon which said means is pivotally supported, and xed guide members carried by said bracket arms and engaging the unit adjacent the lower end thereof, said guide members being adapted to maintain said unit in a vertical position during the raising and lowering operation by guiding the lower end of said unit in an are equal to the arc in which the upper end is raised.

4. In glass surfacing apparatus, a substantially vertically arranged surfacing unit, means pivotally associated with the unit adjacentthe upper end thereof for raising and lowering the same vertically through an arc, substantially vertically arranged bracket members upon which said means is pivotally supported, trunnions carried by said unit a jacent the lower end thereof, and fixed guide members carried by said bracket arms and receiving said trunnions therein, said guide members being adapted to maintain the unit in a vertical position during the raising and lowering operation by guiding the lower end of said unit in an are equal to the arc in which the upper end is raised.-

5. In glass surfacing apparatus, a substantially vertically arranged surfacing unit, a carriage receivlng the unit therethrough and removably supporting the same adjacent the upper end thereof, means engaging said carriage for raising and lowering the same together with said unit vertically through an arc, and rigid means associated with the unit adjacent the lower endthereof for guiding the said lower end whereby to retain the unit in a vertical position during the raising and lowering operation by guiding the lower end of said unit in an arc equal to the arc in which the u per end is raised.

6. n glass surfacing apparatus, a substantially vertically arranged surfacing unit, a carriage for receiving the unit therethrough and removably supporting the same adjacent the upper end thereof, oppositely disposed trunnions fixed to said carriage, means pivotally engaging said trunnions for raising and lowering sai carriage together with said unit vertically throu h an arc, substantially vertically arranged racket members upon which said raising and lowering means ispivotally mounted, oppositely dis osed trunnions carried b the surfacing unit adjacent the lower end' t ereof, substantially U-shaped ixed guide members carried by said bracket meml.

bers and receiving the second named trunnions therein, and removable shoes arran ed within 'each guide member, said shoes having adjacent convex and concave surfaces respectivel along which said trunnions ride,

said gui e members being adapted to guide the lower end of the surfacing unit whereby to-retain said unit in a vertical position during the raising and lowering operation by guiding the lower end of said unit in an arc equal to the arc in which the upper end is raised.

7. In glass surfacing apparatus, a substantially vertically arranged surfacing unit, a carriage for receiving the unit therethrough and removably supporting the same adjacent the upper end thereof, means pivotally associated with said carriage for raising and lowering the same together with the unit vertically throu h anarc, substantially vertically arranged racket members upon which said raising and lowering means is pivotally mounted, and rigid means carried by said bracket members and engaging said unit adjacent the lower end thereof in order to retain the unit in a vertical position during the raising and lowering operation by guiding the lower end of said unit in an arc equal to the arc in which the upper end is raised.

S' ed at Toledo, in the county of Lucas and tate of Ohio, this 18th day of October,

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